You're best compression appears to be 50%... which means you aren't exactly going to be moving all your CD's to this format... but it's just a refreshing feeling not to actually lose data in the compression...

The beauty of shorten is for transfering CDs across a network and maintaining more or less exact copies of the original. This is paramount in taping and trading circles, and many distribution methods (e.g. Tape Trees) have been replaced with SHN trees.